SECURITY REPORT · EXTENSHI SCAN
MetaMask – Crypto Wallet
Firefox extension·by MetaMask
0
/ 100 SAFETY SCORE
DANGEROUS
Meaningful risk surface. Avoid on managed devices without review.
Automated analysis of publicly available code — not a professional security audit. It may produce false positives and does not prove an extension is unsafe or safe. Treat it as one signal among many. Disclaimer · Report an issue
How it ranks
MetaMask – Crypto Wallet's safety score vs every other extension we've scanned
Globally
29.739999999999995%of extensions carry more risk
Riskier ←→ Safer
Ranked across every extension we scan
In its category
19.739999999999995%of its category extensions carry more risk
Riskier ←→ Safer
Ranked within its category
Findings
366
median 38Lower is safer
Risky permissions
6
median 1Critical + high perms
Total permissions
17
median 4All declared perms
Critical findings
0
median 2Severity = Critical
Findings breakdown
Automated security signal · 366 distinct issues across 6 severities
366
distinct issues
detected
detected
Scanners reported 740 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical00%
High247%
Needs Review00%
Medium28678%
Low5615%
Info00%
Permissions requested
6 risky permissions of 17 total
6 high-risk permissions require attention
This extension requests 17 permissions in total. 6 of them grant broad capabilities that are worth a careful look.
High
Access all HTTP sites
Can read and modify content on all non-encrypted websites
High
Access all HTTPS sites
Can read and modify content on all encrypted websites
High
Observe web requests
Can monitor all network requests made by the browser
High
Block and modify web requests
Can intercept, block, or modify any network request before it completes
High
Access browser cookies
Can read and modify cookies, potentially accessing login sessions
High
Access local files
Can read files on your local filesystem opened in the browser
Medium
Store local data
Can save data locally in the browser for persistence
Medium
Unlimited local storage
Can store large amounts of data locally without size limits
Medium
Write to clipboard
Can place content onto your clipboard
Medium
Access current tab
Can temporarily access the content of the active tab when you click the extension
Medium
Show notifications
Can display desktop notifications outside the browser
Medium
Access user identity
Can get OAuth2 tokens and access your Google account identity
Medium
Read clipboard
Can read text and data currently on your clipboard
Info
ws://*/*
No additional information available.
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Scan performed by extenshi.io · Jul 25, 2026· partial run (some scanners failed)
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